(Stack Monitoring) Ingest Pipeline install HTTP 404 errors

[stefnestor]

👋 howdy, team! Following-up to kibana#41936 and kibana#149386, attempting a default Elastic Cloud setup with Logs&Metrics enabled is erring under "Ingest Pipelines".

1. Create Deployment (GCP v8.15.3 "storage optimized") with ES (2GB by 2 zones) and KB (1GB by 1 zone)
2. Enable Logs&Metrics. (Confirmed occurs with and without "self-monitoring".)
3. Create a Data View under Stack Management (so doesn't redirect you later, just for demo purposes).
4. Navigate Stack Monitoring > select "remind me later" for "Create Rules" pop-in > Elasticsearch Overview > Ingest Pipelines.
5. See errors HTTP 404 Saved object [dashboard/elasticsearch-metrics-ingest-pipelines] not found
   
6. Attempting kibana#149386 workaround POST /api/fleet/epm/packages/elasticsearch/latest from DevTools HTTP 500 errors (without KB logs saying more than literally the same)
   
7. Instead do longer workaround : Kibana > Integrations, search "Elasticsearch" (/app/integrations/detail/elasticsearch-1.15.3/overview) > "Add Elasticsearch" > "Add integration only (skip agent installation)" > "Save and continue" > "Add Elastic Agent later". Page loads after as expected.
   

[consulthys]

This should be solved by #190980